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BOSTON MARATHON 2025

Daniel Slowikowski

Bib: 8914•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 24%
Masters (Masters Men)
#0 / 10463
Top 10%
Division (M45-49)
#0 / 2386
Top 12%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #5336
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:41
Rank: #5442 (-106)
5K → 10K
20:54 | 6:44/mi
15K· 9.32 mi
1:02:41
Rank: #5492 (-50)
10K → 15K
21:00 | 6:46/mi
20K· 12.43 mi
1:23:51
Rank: #5443 (+49)
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:28:28
Rank: #5466 (-23)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:45:04
Rank: #5388 (+78)
Half → 25K
16:36 | 6:51/mi
30K· 18.64 mi
2:06:34
Rank: #5065 (+323)
25K → 30K
21:30 | 6:55/mi
20M
2:15:54
Rank: #4881 (+184)
30K → 20M
9:20 | 6:52/mi
21M
2:23:08
Rank: #4735 (+146)
20M → 21M
7:14 | 7:14/mi
35K· 21.75 mi
2:28:03
Rank: #4614 (+121)
21M → 35K
4:55 | 6:34/mi
23M
2:36:40
Rank: #4469 (+145)
35K → 23M
8:37 | 6:53/mi
24M
2:43:22
Rank: #4365 (+104)
23M → 24M
6:42 | 6:42/mi
40K· 24.85 mi
2:49:13
Rank: #4288 (+77)
24M → 40K
5:51 | 6:51/mi
25.2M
2:51:46
Rank: #4246 (+42)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:58:21
Rank: #4127 (+119)
25.2M → Finish
6:35 | 6:28/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:28
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:29:53
Pace6:51 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3320:476:4120:47
6:41
-
10K
6.21 mi10:45:2741:416:4220:54
6:44
+0:03
15K
9.32 mi11:06:271:02:416:4421:00
6:46
+0:02
20K
12.43 mi11:27:371:23:516:4521:10
6:49
+0:03
Half
13.11 mi11:32:141:28:286:454:37
6:46
-0:03
25K
15.53 mi11:48:501:45:046:4616:36
6:51
+0:05
30K
18.64 mi12:10:202:06:346:4721:30
6:55
+0:04
20M
20.00 mi12:19:402:15:546:489:20
6:52
-0:03
21M
21.00 mi12:26:542:23:086:497:14
7:14
+0:22
35K
21.75 mi12:31:492:28:036:484:55
6:34
-0:40
23M
23.00 mi12:40:262:36:406:498:37
6:53
+0:19
24M
24.00 mi12:47:082:43:226:486:42
6:42
-0:11
40K
24.85 mi12:52:592:49:136:485:51
6:51
+0:09
25.2M
25.20 mi12:55:322:51:466:492:33
7:24
+0:33
Finish
26.22 mi13:02:072:58:216:486:35
6:28
-0:56

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:28 /mi

Average Pace

6:48 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:34

95% of race

Time at Steady Pace

9:47

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:48 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:24:3320:476:4120:47
6:41
#5336
10K
6.21 mi10:45:2741:416:4220:54
6:44
#5442
15K
9.32 mi11:06:271:02:416:4421:00
6:46
#5492
20K
12.43 mi11:27:371:23:516:4521:10
6:49
#5443
Half
13.11 mi11:32:141:28:286:454:37
6:46
#5466
25K
15.53 mi11:48:501:45:046:4616:36
6:51
#5388
30K
18.64 mi12:10:202:06:346:4721:30
6:55
#5065
20M
20.00 mi12:19:402:15:546:489:20
6:52
#4881
21M
21.00 mi12:26:542:23:086:497:14
7:14
#4735
35K
21.75 mi12:31:492:28:036:484:55
6:34
#4614
23M
23.00 mi12:40:262:36:406:498:37
6:53
#4469
24M
24.00 mi12:47:082:43:226:486:42
6:42
#4365
40K
24.85 mi12:52:592:49:136:485:51
6:51
#4288
25.2M
25.20 mi12:55:322:51:466:492:33
7:24
#4246
Finish
26.22 mi13:02:072:58:216:486:35
6:28
#4127
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5336496049605664(Top 20%)5168(Top 32%)5168(Top 217%)
10K6.21 mi3.10 mi5442-1065036-765036-765575(Top 20%)5124(Top 32%)5124(Top 215%)
15K9.32 mi3.11 mi5492-505076-405076-405664(Top 20%)5168(Top 32%)5168(Top 217%)
20K12.43 mi3.11 mi5443+495024+525024+525400(Top 19%)4947(Top 31%)4947(Top 207%)
Half13.11 mi0.68 mi5466-235040-165040-165740(Top 20%)5227(Top 32%)5227(Top 219%)
25K15.53 mi2.42 mi5388+784960+804960+805221(Top 18%)4783(Top 30%)4783(Top 200%)
30K18.64 mi3.11 mi5065+3234664+2964664+2964208(Top 15%)3862(Top 24%)3862(Top 162%)
20M20.00 mi1.36 mi4881+1844511+1534511+1533312(Top 12%)3063(Top 19%)3063(Top 128%)
21M21.00 mi1.00 mi4735+1464381+1304381+1303278(Top 12%)3016(Top 19%)3016(Top 126%)
35K21.75 mi0.75 mi4614+1214268+1134268+1132827(Top 10%)2609(Top 16%)2609(Top 109%)
23M23.00 mi1.25 mi4469+1454133+1354133+1353119(Top 11%)2849(Top 18%)2849(Top 119%)
24M24.00 mi1.00 mi4365+1044032+1014032+1012978(Top 10%)2702(Top 17%)2702(Top 113%)
40K24.85 mi0.85 mi4288+773955+773955+773038(Top 11%)2734(Top 17%)2734(Top 115%)
25.2M25.20 mi0.35 mi4246+423915+403915+402905(Top 10%)2584(Top 16%)2584(Top 108%)
Finish26.22 mi1.02 mi4127+1193805+1103805+1102614(Top 9%)2364(Top 15%)2364(Top 99%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5664

Males

5168

M45-49

5168

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5575

Males

5124

M45-49

5124

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5664

Males

5168

M45-49

5168

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5400

Males

4947

M45-49

4947

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5740

Males

5227

M45-49

5227

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5221

Males

4783

M45-49

4783

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4208

Males

3862

M45-49

3862

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3312

Males

3063

M45-49

3063

20M→21M

20.0 - 21.0 mi

Top 12%
×8stories
+106ft-24ft

Overall

3278

Males

3016

M45-49

3016

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2827

Males

2609

M45-49

2609

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3119

Males

2849

M45-49

2849

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2978

Males

2702

M45-49

2702

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3038

Males

2734

M45-49

2734

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2905

Males

2584

M45-49

2584

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2614

Males

2364

M45-49

2364

Passing Analysis

Category:
Athletes Passed
1887
Passed By
678
Net Change
+1209
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5336
5K → 10K131237-106#5336#5442
10K → 15K97147-50#5442#5492
15K → 20K14394+49#5492#5443
20K → Half2245-23#5443#5466
Half → 25K14567+78#5466#5388
25K → 30K34825+323#5388#5065
30K → 20M1917+184#5065#4881
20M → 21M1548+146#4881#4735
21M → 35K1221+121#4735#4614
35K → 23M15813+145#4614#4469
23M → 24M11410+104#4469#4365
24M → 40K8912+77#4365#4288
40K → 25.2M497+42#4288#4246
25.2M → Finish1245+119#4246#4127
TOTALS1887678+1209
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing